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2stf2220


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                                                                                     2STF2220

                                   High gain Low Voltage PNP power transistor

Features
   Very low Collector to Emitter saturation voltage
   D.C. Current gain, hFE >100
   1.5 A continuous collector current

Applications
   Power management in portable equipment
   Switching regulator in battery charger                                   SOT-89
   applications

Description
The device in a PNP transistor manufactured              Figure 1.   Internal schematic diagram
using new "PB-HDC" (Power Bipolar High Density
Current) technology. The resulting transistor
shows exceptional high gain performances
coupled with very low saturation voltage.




Table 1.      Device summary
   Order code         Marking                     Package                         Packaging

   2STF2220             2220                          SOT-89                      Tape & reel




September 2007                                    Rev 3                                              1/11
                                                                                                www.st.com   11
                                                                                                                2STF2220


Contents
1      Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2      Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
       2.1      Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
       2.2      Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3      Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4      Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10




2/11
2STF2220                                                                Electrical ratings


1          Electrical ratings

           Table 2.     Absolute maximum rating
            Symbol                            Parameter               Value         Unit

             VCBO     Collector-base voltage (IE = 0)                  -20           V
             VCEO     Collector-emitter voltage (IB = 0)               -20           V
             VEBO     Emitter-base voltage (IC = 0)                    -5            V

               IC     Collector current                                -1.5          A
              ICM     Collector peak current (tP < 5ms)                -3            A
               IB     Base current                                     -0.1          A
              IBM     Base peak current (tP < 5ms)                     -0.2          A

              Ptot    Total dissipation at T amb = 25



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